Machine for forming wire-fence stays.



Patented May 29, 1917. 2 SHEETS-SHEET 1 l/VI/ENfOR wfa ue Fm'ese Z ATTORIVE G. F. KRIESEL.

MACHINE FOR FORMING WIRE FENCE STAYS.

I APPLICATION FILED MAY 25, 1916.

K MN W W G. F. KRIESEL. MACHINE FOR FORMING WIRE FENCE STAYS;

APPLICATION FILED MAYZS, 1915- I Patented May'29, 1917.

2 SHEETS-SHEET 2.

I/IIIIIIIIIIIIIIIIIIIIIII 4 H WIIIIIIIIIIIIIIIImII/IA .jll llVl/ENTOR m'egeZ WITNESSES:

GasZ m/e f A TTORIVEY GUSTAVE KRIESEL, 0F MINNEAPOLIS, MINNESOTA, ASSIGNOR TO CHARLES A,

' RICKERT, OF MINNEAPOLIS, MINNESOTA. I

MACHINE FOR FORMING WIRE-FENCE STAYS.

Specification of Letters Patent. Patented May 29, 1S1?- Application filed. May 25, 1916. Serial no. 99,890.

To all whom it may concern:

Be it known that I, GUsTAvn F. KRrEsnL, a citizen of the United States, residingfat Minneapolis, county of Hennepin, and State of ,Minnesota, have invented a new and useful Improvement in Machines for Forming Wire-Fence Stays, of which the following is a specification. i

This invention relates to improvements in machines for forming wire fence stays of that character in which the wire constituting the stay is loosely entwined about a straight portion thereof, in order that the stay may be adjusted on the strands of a fence to hold them in spaced relation. The primary object of this invention is the production of a simple and inexpensive machine which will quickly and efliciently bend and form the wire constituting the stay.

Further objects will be apparent from the following description.

To these ends my invention comprises the features of construction and combination of parts hereinafter more particularly described and claimed.

In the accompanying drawings forming part of this specification, Figure 1 is an elevation partly in section and partly broken away of'my invention; Fig. 2 is a side elevation of one of the fence stays which is adapted to be formed by this invention; Fig. 3 is a section of a detail taken upon the line XX of Fig. 1; Fig. 4 is an end view of a detail; Fig. 5 is a longitudinal section of a detail, and Fig. 6 is an end view of (vivhat I have chosen to term the primary In the drawing, let A indicate a suitable frame having a longitudinal track 2 of-T- shape in cross sectionas illustrated in Fig. 3, and a head 3, in which the main drive shaft 4 is suitably journaled, said drive shaft being revolved by the drive pulley 5 or any ot er suitable driving mechanism. The head 3 is formed with a gear housing 6 and a longitudinal journal bearing 7. Journaled within the bearing7 is a longitudinal sleeve 8, which is held from longitudinal movement on one end by the shoulder 9, and on the other end by a worm gear 10, which is secured by set screws 11 (see Fig. 4) within the gear housing 6. The worm gearing 1O is arranged with its teeth meshing with the teeth of a worm pinion 12, the latter being m nt d pon the drive shaft t and sec theretoby the pin 13. Thus, as the shaft atis revolved, the sleeve 8 is rotated in the bearing 7. Secured within the sleeve 8 by a set screw 14, or other suitable means, is a hollow secondary twisting or entwining die 15, which is formedwith a spiral groove 16 extending throughout its length, the sides of said groove being flat and produced by a corresponding spiral rib 17 The entwining die contains the longitudinal straight passage 18 through which a primary forming die in the form of a shaft 19 is adapted to slide. The outer end of the primary die is held centrally in alinement with the axis of the secondarydie' by a support 20 having an opening 21 in. which the primary die is received and clamped by the set bolt 22. The support 20 is mounted upon the carriage 23, which carries pairs of antifriction guide rollers 24, said rollers being formed with grooved peripheries 25 freely engaging over the edges of the horizontal bar of the T -shaped track 2, thus supporting and guiding the carriage in its movement. The track 2 is disposed so that the movement of the carriage guides the primary forming die freely through the passage 18 in the secondary die.

The stay which is adapted tobe formed by my invention is illustrated in Fig. 2, and comprises a single piece of wire formed with a straight shaft or body 30, said wire being bent between its ends, looped back and twisted into a spiral portion 31, said spiral portion being loosely entwined around said shaft. The primary forming die, which resembles a circular shaft 19 is constructed with a longitudinal groove 32 extending throughout its length, in which the shaft 30 of the stay is held during the formation of the stay. The end of the shaft 30 during the formation of the stay is held in the groove 32 by the set bolt 22, which also clamps the primary die in the support 20.

The opposite end of the primary die from that which is held in the support 20 is cut turning of the drive pulley 5 in the direction of the arrow illustrated in Fig. 4 and the spiral thread or rib of the secondary die catches the outwardly extending end portion of the stay wire and bends and entwines the wire through the spiral groove 16 encircling the primary or inner die member, the carriage 23 being drawn forwardly automatically until the free end of the stay has been completely entwined about the primary die and the shaft 30 of the stay, which is held -in the groove 32. Upon completing the entwining operation the bolt 22 is loosened and the stay drawn outwardly from engagement with the machine. It will be noted that the finished stay is then formed with a loosely entwined portion around its body or shaft member, the inner diameter of the entwining portion being considerably greater than the outer diameter of the shaft portion due to the size in diameter of the base of the thread on the secondary die member. The machine is susceptible of manufacturing wire stays of the character described in large numbers quickly, and the apparatus being of simple mechanical construction its operation is most effective. During the entwining operation, the free end which is being entwined about the shaft portion of the stay is restricted in its outward movement by a circular guard 35, which is mounted upon and secured by the rivet 36 or-other suitable means on the carriage and encompasses the primary die.

In accordance with the patent statutes, 1 have describedthe principles of operation of my invention, together witlnthe apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shown is only illustrative, and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A machine for loosely entwining a portion of a wire stay about a substantially straight shaft portion thereof, comprising, in combination, a. supporting frame, a longitudinal track carried by said frame, a revoluble member journaled in said frame, means carried by said frame for rotating said revoluble member, a hollow secondary die member having an outer spiral thread, said secondary die member being rotated by said revoluble member, a primary die slidably mounted in said secondary die having a longitudinal passage-way adapted to receive and form a bearing for the straight shaft portion of the stay, and a carriage movable upon said track and to which the outer end of said secondary die and the shaft portion of said stay are clamped, said secondary die having its spiral thread so arranged as to engage and entwine a portion of the stay about that portion thereof, which is held in the groove of said primary die.

2. A machine for loosely entwining one portion of a wire fence stay about another portion comprising in combination two die members, one constituting a primary die in the form of a shaft having a longitudinal passage in which a portion of the stay is held and a notch in its end through which the stay is bent and the other die member constituting a secondary die having longitudinal passage through which the primary die is adapted to slide and a spiral thread on its outer surface adapted to engage and entwine the portion of the stay around that portion which is held within said primary die, a sleeve in which said secondary die is secured, a support in wnich said .sleeve is journaled and means for revolving said sleeve.

3. A machine for loosely entwining a portion of a wire fence stay around another portion thereof, comprising, in combination, two die members, one constituting a primary die having a longitudinal groove in which a portion of the stay is held and a notch in one end of said primary die through which the stay is bent back and the other of said die members constituting a secondary die being formed with a longitudinal passage through which said primary die is slidable and a spiral thread on the outer surface of said secondary die adapted to engage and entwine the bent back outer portion of the stay around that portion which is held within said primary die, a sleeve surrounding and secured to said secondary die, a frame in which said sleeve is journaled, means for revolving said sleeve to effect the revolution of said secondary die around said primary die, a carriage movably mounted to travel toward said secondary die during the entwining operation thereof,said carriage being secured to and supporting the outer portion of said primary die and the portion of the stay which is held within said primary die, and a guard encompassing said primary die and carried by said carriage for limiting the outward position of that portion of the stay, which is being entwined about that portion of the stay which is held within said primary die.

In testimony whereof, I have signed my name to this specification.

GUSTAVE F. KRIESEL.

Copies of thispatent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. 0. 

